Nickel Alloy Hastelloy B-AW (As-welded deposit)
Heat-treated state
UNS N10001 · EN 2.4810
Weldment properties with matching filler; post-weld solution anneal is strongly recommended for HCl service because of HAZ carbide precipitation.
Values for the AW condition
Other Hastelloy B tempers and conditions
Hastelloy B is listed in 5 conditions; see the grade overview at Hastelloy B.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As cast | Sand/investment cast pump and valve bodies in the Ni-Mo chemistry, supplied solution treated; lower ductility than wrought product. | 290 | 550 | 8 | 190 HB | 1.3 % IACS |
SADefault Solution annealed | Standard supply condition for plate, sheet, bar, pipe and fittings — maximum corrosion resistance and ductility. | 380 | 830 | 55 | 200 HB | — |
Hot finished | As-hot-worked heavy bar/forgings; slightly higher strength but reduced corrosion performance — anneal before aggressive acid service. | 450 | 870 | 40 | 22 HRC | 1.3 % IACS |
AWThis page As-welded deposit | Weldment properties with matching filler; post-weld solution anneal is strongly recommended for HCl service because of HAZ carbide precipitation. | 450 | 760 | 30 | 215 HB | 1.3 % IACS |
Cold worked | Cold-drawn bar, wire and tube where higher strength and closer tolerance matter more than optimum corrosion resistance. | 860 | 1,100 | 18 | 30 HRC | 1.3 % IACS |
What is Hastelloy B-AW?
Hastelloy B-AW is Hastelloy B heat treated to AW — weldment properties with matching filler; post-weld solution anneal is strongly recommended for HCl service because of HAZ carbide precipitation. Hastelloy B-AW has a yield strength of 450 MPa (65.3 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 66% of nickel alloy grades. Elongation at break is 30% and the elastic modulus is 217 GPa (31.5 Msi). Hastelloy B-AW has a density of 9.24 g/cm³ (0.334 lb/in³), heavier than 99% of nickel alloy grades. It melts at 1,320°C (2,408 °F). SA is the default condition FabDigit quotes; AW is available on request or by drawing note.
Limitations
- Limited service temperature — 400°C (752 °F), worse than 94% of nickel alloy grades
- Needs corrosion protection — 62/100, worse than 87% of nickel alloy grades
Hastelloy B-AW properties
Typical room-temperature values for Hastelloy B-AW; 21 are specific to this condition. Other listed values are Hastelloy B reference data and may not represent this condition. Bars are the position among nickel alloy grades.
Physical3
Hastelloy B-AW has a density of 9.24 g/cm³ (0.334 lb/in³), heavier than 99% of nickel alloy grades. It melts at 1,320°C (2,408 °F).
Mechanical14
Hastelloy B-AW has a yield strength of 450 MPa (65.3 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 66% of nickel alloy grades. Elongation at break is 30% and the elastic modulus is 217 GPa (31.5 Msi).
Thermal6
Hastelloy B-AW is rated for continuous service to 400°C (752 °F). It conducts heat at 11.1 W/m·K (6.41 BTU/hr·ft·°F), worse than 54% of nickel alloy grades. Thermal expansion is 10.3 µm/m·K (5.72 µin/in·°F).
Electrical3
Hastelloy B-AW conducts electricity at 1.3 % IACS, worse than 89% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is good (62/100), worse than 87% of nickel alloy grades.
Sustainability4
Producing a kilogram of Hastelloy B-AW takes about 165 MJ of energy and emits 13 kg of CO₂ — more than 54% of nickel alloy grades. Typical recycled content is 35%.
Manufacturability8
Hastelloy B-AW's machinability is poor (20/100, better than 53% of nickel alloy grades); weldability good (55/100); formability poor (25/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Hastelloy B-AW
Is Hastelloy B easy to machine?
Machine like an annealed austenitic Ni-Mo alloy: rigid setup, positive-rake sharp carbide, slow speeds (~10–20 m/min carbide turning), heavy positive feeds to cut under the work-hardened layer, flood sulfochlorinated coolant.
Can Hastelloy B be welded?
GTAW/GMAW/SMAW with matching ERNiMo-1/ENiMo-1, low heat input, no preheat, interpass under 100 °C; solution anneal at ~1150 °C and water quench after welding for HCl service to avoid HAZ carbide and knife-line attack.
Can Hastelloy B be formed, bent or molded?
Cold forms readily but work-hardens fast — use ~50 % more power than 304, generous radii and intermediate anneals; hot work 1180–950 °C then water quench, never finish below ~900 °C.
What surface finishes work on Hastelloy B?
Pickle in HF/HNO3 sparingly (nitric attacks the alloy — prefer grit blast plus HCl-free descale), then mechanically polish or electropolish; no anodizing, and no coating is normally needed.
Hastelloy B chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Moprimary corrosion-resisting element in reducing acids | 26 – 30 | 28 |
| Fe | 4 – 7 | 5 |
| Crresidual only; no oxidizing-media resistance | ≤ 1 | 0.5 |
| Co | ≤ 2.5 | — |
| Chigher than B-2/B-3; source of HAZ carbide precipitation | ≤ 0.05 | 0.03 |
| Mn | ≤ 1 | — |
| Si | ≤ 1 | — |
| V | 0.2 – 0.4 | 0.3 |
| P | ≤ 0.03 | — |
| S | ≤ 0.03 | — |
| Nibalance, ~62–66 % | balance | — |
Hastelloy B-AW — frequently asked
What is Hastelloy B-AW used for?
Hastelloy B-AW is typically used for hydrochloric acid processing equipment, chemical reactor vessels and pumps and valves in reducing acid service. In short: benchmark HCl-resistant alloy; superseded by Hastelloy B-2; no oxidizing-media service.
What is the yield strength of Hastelloy B-AW?
Hastelloy B-AW has a typical yield strength of 450 MPa (65.3 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 66% of nickel alloy grades. Strength varies by condition: see the 5 listed tempers.
Is Hastelloy B-AW easy to machine?
Not especially — machinability is rated poor (20/100, better than 53% of nickel alloy grades). Machine like an annealed austenitic Ni-Mo alloy: rigid setup, positive-rake sharp carbide, slow speeds (~10–20 m/min carbide turning), heavy positive feeds to cut under the work-hardened layer, flood sulfochlorinated coolant.
Can Hastelloy B-AW be welded?
Yes — weldability is rated good (55/100). GTAW/GMAW/SMAW with matching ERNiMo-1/ENiMo-1, low heat input, no preheat, interpass under 100 °C; solution anneal at ~1150 °C and water quench after welding for HCl service to avoid HAZ carbide and knife-line attack.
What surface finishes work on Hastelloy B-AW?
Pickle in HF/HNO3 sparingly (nitric attacks the alloy — prefer grit blast plus HCl-free descale), then mechanically polish or electropolish; no anodizing, and no coating is normally needed.
Can Hastelloy B-AW be formed, bent or molded?
Cold forms readily but work-hardens fast — use ~50 % more power than 304, generous radii and intermediate anneals; hot work 1180–950 °C then water quench, never finish below ~900 °C.
What is the maximum service temperature of Hastelloy B-AW?
Hastelloy B-AW is rated for continuous use to about 400°C (752 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Hastelloy B-SA and Hastelloy B-CW?
SA is the default condition — standard supply condition for plate, sheet, bar, pipe and fittings — maximum corrosion resistance and ductility. CW: cold-drawn bar, wire and tube where higher strength and closer tolerance matter more than optimum corrosion resistance. Yield strength is 380 MPa in SA versus 860 MPa in CW.
Sources
- ASTM B333 — Ni-Mo Alloy Plate, Sheet and Strip (UNS N10001) — ASTM International (2018)
- ASTM B335 — Nickel-Molybdenum Alloy Rod — ASTM International (2018)
- ASTM B622 / B619 — Ni-Mo Alloy Seamless and Welded Pipe & Tube — ASTM International (2017)
- ASTM A494 — Castings, Nickel and Nickel Alloy (grade N-12MV) — ASTM International (2018)
- Hastelloy B / B-2 alloy technical data — Haynes International (2020)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- ASM Specialty Handbook: Nickel, Cobalt and Their Alloys — ASM International (2000)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.